package.lib.contain.path.js Maven / Gradle / Ivy
import PathProxy from '../core/PathProxy.js';
import * as line from './line.js';
import * as cubic from './cubic.js';
import * as quadratic from './quadratic.js';
import * as arc from './arc.js';
import * as curve from '../core/curve.js';
import windingLine from './windingLine.js';
var CMD = PathProxy.CMD;
var PI2 = Math.PI * 2;
var EPSILON = 1e-4;
function isAroundEqual(a, b) {
return Math.abs(a - b) < EPSILON;
}
var roots = [-1, -1, -1];
var extrema = [-1, -1];
function swapExtrema() {
var tmp = extrema[0];
extrema[0] = extrema[1];
extrema[1] = tmp;
}
function windingCubic(x0, y0, x1, y1, x2, y2, x3, y3, x, y) {
if ((y > y0 && y > y1 && y > y2 && y > y3)
|| (y < y0 && y < y1 && y < y2 && y < y3)) {
return 0;
}
var nRoots = curve.cubicRootAt(y0, y1, y2, y3, y, roots);
if (nRoots === 0) {
return 0;
}
else {
var w = 0;
var nExtrema = -1;
var y0_ = void 0;
var y1_ = void 0;
for (var i = 0; i < nRoots; i++) {
var t = roots[i];
var unit = (t === 0 || t === 1) ? 0.5 : 1;
var x_ = curve.cubicAt(x0, x1, x2, x3, t);
if (x_ < x) {
continue;
}
if (nExtrema < 0) {
nExtrema = curve.cubicExtrema(y0, y1, y2, y3, extrema);
if (extrema[1] < extrema[0] && nExtrema > 1) {
swapExtrema();
}
y0_ = curve.cubicAt(y0, y1, y2, y3, extrema[0]);
if (nExtrema > 1) {
y1_ = curve.cubicAt(y0, y1, y2, y3, extrema[1]);
}
}
if (nExtrema === 2) {
if (t < extrema[0]) {
w += y0_ < y0 ? unit : -unit;
}
else if (t < extrema[1]) {
w += y1_ < y0_ ? unit : -unit;
}
else {
w += y3 < y1_ ? unit : -unit;
}
}
else {
if (t < extrema[0]) {
w += y0_ < y0 ? unit : -unit;
}
else {
w += y3 < y0_ ? unit : -unit;
}
}
}
return w;
}
}
function windingQuadratic(x0, y0, x1, y1, x2, y2, x, y) {
if ((y > y0 && y > y1 && y > y2)
|| (y < y0 && y < y1 && y < y2)) {
return 0;
}
var nRoots = curve.quadraticRootAt(y0, y1, y2, y, roots);
if (nRoots === 0) {
return 0;
}
else {
var t = curve.quadraticExtremum(y0, y1, y2);
if (t >= 0 && t <= 1) {
var w = 0;
var y_ = curve.quadraticAt(y0, y1, y2, t);
for (var i = 0; i < nRoots; i++) {
var unit = (roots[i] === 0 || roots[i] === 1) ? 0.5 : 1;
var x_ = curve.quadraticAt(x0, x1, x2, roots[i]);
if (x_ < x) {
continue;
}
if (roots[i] < t) {
w += y_ < y0 ? unit : -unit;
}
else {
w += y2 < y_ ? unit : -unit;
}
}
return w;
}
else {
var unit = (roots[0] === 0 || roots[0] === 1) ? 0.5 : 1;
var x_ = curve.quadraticAt(x0, x1, x2, roots[0]);
if (x_ < x) {
return 0;
}
return y2 < y0 ? unit : -unit;
}
}
}
function windingArc(cx, cy, r, startAngle, endAngle, anticlockwise, x, y) {
y -= cy;
if (y > r || y < -r) {
return 0;
}
var tmp = Math.sqrt(r * r - y * y);
roots[0] = -tmp;
roots[1] = tmp;
var dTheta = Math.abs(startAngle - endAngle);
if (dTheta < 1e-4) {
return 0;
}
if (dTheta >= PI2 - 1e-4) {
startAngle = 0;
endAngle = PI2;
var dir = anticlockwise ? 1 : -1;
if (x >= roots[0] + cx && x <= roots[1] + cx) {
return dir;
}
else {
return 0;
}
}
if (startAngle > endAngle) {
var tmp_1 = startAngle;
startAngle = endAngle;
endAngle = tmp_1;
}
if (startAngle < 0) {
startAngle += PI2;
endAngle += PI2;
}
var w = 0;
for (var i = 0; i < 2; i++) {
var x_ = roots[i];
if (x_ + cx > x) {
var angle = Math.atan2(y, x_);
var dir = anticlockwise ? 1 : -1;
if (angle < 0) {
angle = PI2 + angle;
}
if ((angle >= startAngle && angle <= endAngle)
|| (angle + PI2 >= startAngle && angle + PI2 <= endAngle)) {
if (angle > Math.PI / 2 && angle < Math.PI * 1.5) {
dir = -dir;
}
w += dir;
}
}
}
return w;
}
function containPath(path, lineWidth, isStroke, x, y) {
var data = path.data;
var len = path.len();
var w = 0;
var xi = 0;
var yi = 0;
var x0 = 0;
var y0 = 0;
var x1;
var y1;
for (var i = 0; i < len;) {
var cmd = data[i++];
var isFirst = i === 1;
if (cmd === CMD.M && i > 1) {
if (!isStroke) {
w += windingLine(xi, yi, x0, y0, x, y);
}
}
if (isFirst) {
xi = data[i];
yi = data[i + 1];
x0 = xi;
y0 = yi;
}
switch (cmd) {
case CMD.M:
x0 = data[i++];
y0 = data[i++];
xi = x0;
yi = y0;
break;
case CMD.L:
if (isStroke) {
if (line.containStroke(xi, yi, data[i], data[i + 1], lineWidth, x, y)) {
return true;
}
}
else {
w += windingLine(xi, yi, data[i], data[i + 1], x, y) || 0;
}
xi = data[i++];
yi = data[i++];
break;
case CMD.C:
if (isStroke) {
if (cubic.containStroke(xi, yi, data[i++], data[i++], data[i++], data[i++], data[i], data[i + 1], lineWidth, x, y)) {
return true;
}
}
else {
w += windingCubic(xi, yi, data[i++], data[i++], data[i++], data[i++], data[i], data[i + 1], x, y) || 0;
}
xi = data[i++];
yi = data[i++];
break;
case CMD.Q:
if (isStroke) {
if (quadratic.containStroke(xi, yi, data[i++], data[i++], data[i], data[i + 1], lineWidth, x, y)) {
return true;
}
}
else {
w += windingQuadratic(xi, yi, data[i++], data[i++], data[i], data[i + 1], x, y) || 0;
}
xi = data[i++];
yi = data[i++];
break;
case CMD.A:
var cx = data[i++];
var cy = data[i++];
var rx = data[i++];
var ry = data[i++];
var theta = data[i++];
var dTheta = data[i++];
i += 1;
var anticlockwise = !!(1 - data[i++]);
x1 = Math.cos(theta) * rx + cx;
y1 = Math.sin(theta) * ry + cy;
if (!isFirst) {
w += windingLine(xi, yi, x1, y1, x, y);
}
else {
x0 = x1;
y0 = y1;
}
var _x = (x - cx) * ry / rx + cx;
if (isStroke) {
if (arc.containStroke(cx, cy, ry, theta, theta + dTheta, anticlockwise, lineWidth, _x, y)) {
return true;
}
}
else {
w += windingArc(cx, cy, ry, theta, theta + dTheta, anticlockwise, _x, y);
}
xi = Math.cos(theta + dTheta) * rx + cx;
yi = Math.sin(theta + dTheta) * ry + cy;
break;
case CMD.R:
x0 = xi = data[i++];
y0 = yi = data[i++];
var width = data[i++];
var height = data[i++];
x1 = x0 + width;
y1 = y0 + height;
if (isStroke) {
if (line.containStroke(x0, y0, x1, y0, lineWidth, x, y)
|| line.containStroke(x1, y0, x1, y1, lineWidth, x, y)
|| line.containStroke(x1, y1, x0, y1, lineWidth, x, y)
|| line.containStroke(x0, y1, x0, y0, lineWidth, x, y)) {
return true;
}
}
else {
w += windingLine(x1, y0, x1, y1, x, y);
w += windingLine(x0, y1, x0, y0, x, y);
}
break;
case CMD.Z:
if (isStroke) {
if (line.containStroke(xi, yi, x0, y0, lineWidth, x, y)) {
return true;
}
}
else {
w += windingLine(xi, yi, x0, y0, x, y);
}
xi = x0;
yi = y0;
break;
}
}
if (!isStroke && !isAroundEqual(yi, y0)) {
w += windingLine(xi, yi, x0, y0, x, y) || 0;
}
return w !== 0;
}
export function contain(pathProxy, x, y) {
return containPath(pathProxy, 0, false, x, y);
}
export function containStroke(pathProxy, lineWidth, x, y) {
return containPath(pathProxy, lineWidth, true, x, y);
}
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